Asia Destination Guide
Japan eSIM
ByeRoaming Japan eSIM on KDDI/au, NTT docomo, Rakuten Mobile from $2.49. Personal hotspot supported; install by QR code or iPhone quick install before you fly. Unlocked eSIM devices only (iPhone XS and newer, plus many Androids). Prices updated Sep 26, 2026.
Japan data plans
Prices from the ByeRoaming catalog snapshot (Sep 26, 2026) — same source as the App, not live per page view.
| Data | Validity | Top-up | Price |
|---|---|---|---|
| 1GB | 7 days | Yes | $2.49 |
| 3GB | 15 days | Yes | $6.49 |
| 5GB | 30 days | Yes | $8.49 |
| 10GB | 30 days | Yes | $12.99 |
| 20GB | 30 days | Yes | $18.49 |
| 50GB | 30 days | Yes | $25.99 |
| 50GB | 180 days | Yes | $39.49 |
Networks & coverage
ByeRoaming Japan eSIM connects through KDDI/au, NTT docomo, Rakuten Mobile, and SoftBank 5G/LTE networks. Coverage is strong in Tokyo, Osaka, Kyoto, and major transit corridors; remote mountain areas may fall back to 4G.
- KDDI/au5G
- NTT docomo5G
- Rakuten Mobile5G
- SoftBank5G
- Tokyo
- Osaka
- Kyoto
Buy, install, connect
- Choose a Japan plan above and complete purchase in the ByeRoaming App (App Store).
- Install over Wi‑Fi via QR code or iPhone quick install — see How to install an eSIM on iPhone.
- After landing, enable the travel eSIM for cellular data. Validity for most plans starts on first local network connection — not at purchase.
Japan eSIM FAQ
- Does ByeRoaming offer an eSIM for Japan?
- Yes. ByeRoaming sells prepaid travel eSIM plans for Japan with instant delivery by QR code or iPhone quick install after purchase. Plans currently start from $2.49 (catalog snapshot updated Sep 26, 2026).
- Which networks does the Japan eSIM use?
- The Japan eSIM connects through KDDI/au, NTT docomo, Rakuten Mobile, SoftBank. Network type is typically 4G/5G where available.
- Can I use personal hotspot with a Japan eSIM?
- Yes. ByeRoaming travel data plans support personal hotspot / tethering so you can share connectivity with a laptop or other devices, subject to your phone and local network policies.
- When does validity start for a Japan eSIM?
- For most plans, the validity period starts when the eSIM first connects to a local network in the destination — not at purchase. Install before you travel; turn on the line when you land.
- Do I need Wi‑Fi to install the Japan eSIM?
- Yes. Download and install the eSIM over Wi‑Fi (or another stable internet connection) before you rely on it abroad. After installation, cellular data works on the destination network without Wi‑Fi.
- Is the Japan eSIM compatible with iPhone and Android?
- ByeRoaming eSIMs work on unlocked eSIM-capable iPhones (typically iPhone XS and newer) and many recent Android phones. Carrier-locked devices may block eSIM installs — check your device settings or carrier.